Update scala version to 2.13.16

Author: aelfric

src/main/g8/build.sbt

@@ -1,6 +1,6 @@
 import Dependencies._
 
-ThisBuild / scalaVersion     := "2.13.12"
+ThisBuild / scalaVersion     := "2.13.16"
 ThisBuild / version          := "0.1.0-SNAPSHOT"
 ThisBuild / organization     := "com.example"
 ThisBuild / organizationName := "example"